C++ (Cpp) matrix_v示例

示例#1

文件： crossprod_test.cpp 项目： javaosos/stan

void test_crossprod(const stan::agrad::matrix_v& L) {
  using stan::agrad::matrix_v;
  using stan::agrad::crossprod;
  matrix_v LLT_eigen = L.transpose() * L;
  matrix_v LLT_stan = crossprod(L);
  EXPECT_EQ(L.rows(),LLT_stan.rows());
  EXPECT_EQ(L.cols(),LLT_stan.cols());
  for (int m = 0; m < L.rows(); ++m)
    for (int n = 0; n < L.cols(); ++n)
      EXPECT_FLOAT_EQ(LLT_eigen(m,n).val(), LLT_stan(m,n).val());
}

示例#2

void test_mult_LLT(const stan::agrad::matrix_v& L) {
  using stan::agrad::matrix_v;
  matrix_v Lp = L; 
  for (int m = 0; m < L.rows(); ++m)
    for (int n = (m+1); n < L.cols(); ++n)
      Lp(m,n) = 0;
  matrix_v LLT_eigen = Lp * Lp.transpose();
  matrix_v LLT_stan = multiply_lower_tri_self_transpose(L);
  EXPECT_EQ(L.rows(),LLT_stan.rows());
  EXPECT_EQ(L.rows(),LLT_stan.cols());
  for (int m = 0; m < L.rows(); ++m)
    for (int n = 0; n < L.rows(); ++n)
      EXPECT_FLOAT_EQ(LLT_eigen(m,n).val(), LLT_stan(m,n).val());  
}